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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.photos.data;
import android.graphics.Bitmap;
import android.media.ExifInterface;
import android.net.Uri;
import android.util.Log;
import android.webkit.MimeTypeMap;
import com.android.gallery3d.common.BitmapUtils;
import java.io.File;
import java.io.IOException;
public class FileRetriever implements MediaRetriever {
private static final String TAG = FileRetriever.class.getSimpleName();
@Override
public File getLocalFile(Uri contentUri) {
return new File(contentUri.getPath());
}
@Override
public MediaSize getFastImageSize(Uri contentUri, MediaSize size) {
if (isVideo(contentUri)) {
return null;
}
return MediaSize.TemporaryThumbnail;
}
@Override
public byte[] getTemporaryImage(Uri contentUri, MediaSize fastImageSize) {
try {
ExifInterface exif = new ExifInterface(contentUri.getPath());
if (exif.hasThumbnail()) {
return exif.getThumbnail();
}
} catch (IOException e) {
Log.w(TAG, "Unable to load exif for " + contentUri);
}
return null;
}
@Override
public boolean getMedia(Uri contentUri, MediaSize imageSize, File tempFile) {
if (imageSize == MediaSize.Original) {
return false; // getLocalFile should always return the original.
}
if (imageSize == MediaSize.Thumbnail) {
File preview = MediaCache.getInstance().getCachedFile(contentUri, MediaSize.Preview);
if (preview != null) {
// Just downsample the preview, it is faster.
return MediaCacheUtils.downsample(preview, imageSize, tempFile);
}
}
File highRes = new File(contentUri.getPath());
boolean success;
if (!isVideo(contentUri)) {
success = MediaCacheUtils.downsample(highRes, imageSize, tempFile);
} else {
// Video needs to extract the bitmap.
Bitmap bitmap = BitmapUtils.createVideoThumbnail(highRes.getPath());
if (bitmap == null) {
return false;
} else if (imageSize == MediaSize.Thumbnail
&& !MediaCacheUtils.needsDownsample(bitmap, MediaSize.Preview)
&& MediaCacheUtils.writeToFile(bitmap, tempFile)) {
// Opportunistically save preview
MediaCache mediaCache = MediaCache.getInstance();
mediaCache.insertIntoCache(contentUri, MediaSize.Preview, tempFile);
}
// Now scale the image
success = MediaCacheUtils.downsample(bitmap, imageSize, tempFile);
}
return success;
}
@Override
public Uri normalizeUri(Uri contentUri, MediaSize size) {
return contentUri;
}
@Override
public MediaSize normalizeMediaSize(Uri contentUri, MediaSize size) {
return size;
}
private static boolean isVideo(Uri uri) {
MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
String extension = MimeTypeMap.getFileExtensionFromUrl(uri.toString());
String mimeType = mimeTypeMap.getMimeTypeFromExtension(extension);
return (mimeType != null && mimeType.startsWith("video/"));
}
}
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